Velocity Premium A2B Stage 6 Plug & Play Amp And Speaker Package For 2025 Harley Davidson® CVO Street Glide Motorcycles

Can you hear your factory Harley speakers loud and clear at highway speeds?

We didn't think so.

Tired of blowing those factory speakers just trying to hear them?

Of course you are! These are common issues we hear ALL the time at Volunteer Audio. That's why we're here to deliver a sound experience that will truly blow you away.

Can you really hear rear speakers when added to your bike?

Absolutely! We get this question frequently, and the answer is a resounding YES. Here's how we ensure you get the full benefit from your rear speakers:

• Optimal Speaker Positioning: For 6x9" speakers, we use custom cut-in kits that elevate the speakers higher in the lid. This not only saves space in your bag but also angles the speakers toward you, improving sound clarity. Most replacement lids don't do this.
• Proper Powering: The Velocity Razor Pro amplifier provides the clean power needed to properly drive the front and rear speakers so they're loud enough to be heard even at highway speeds.
• Balanced Sound: While front speakers will always be louder due to their direct orientation, the saddlebag and Tour Pack speakers add a fuller, more immersive sound experience with enhanced midbass and excellent rear fill.

Our Comprehensive Velocity Razor Audio Upgrade Package Includes:

• Pre-Wired Velocity Razor Pro RZP2000.6 Amplifier: Gains and filters are professionally adjusted for your factory Skyline OS Infotainment radio.
• Volunteer Audio HD-A2B8 Interface: Seamlessly integrates with your Harley-Davidson®, expertly tuned for Velocity Razor systems.
• 1 Pair of Velocity Razor Coax Neo RCN65 6.5" Upper Fairing Speakers: High-output neodymium coaxial speakers designed to deliver crystal-clear vocals, detailed highs, and powerful midbass at highway speeds.
• 1 Pair of Velocity Razor Coax Neo RCN69 6x9" Saddlebag Lid Speakers: Premium high-output neodymium coaxial speakers engineered to provide exceptional midbass, outstanding clarity, and the output needed to keep your music loud and clean on every ride.
• 1 Pair of Velocity Razor Coax Neo RCN65 6.5" Tour Pack Speakers: Matching high-output neodymium coaxial speakers that provide seamless tonal balance and outstanding rear fill for both rider and passenger.
• Velocity Razor Power/Ground Harness: Provides clean, reliable power and grounding for maximum amplifier performance.
• Lengthened Rear Backbone Harness and Modified T-Harness: Designed for an optimal fit, clean installation, and proper system function.

Why Choose Volunteer Audio?

• Pre-Configured Kit: We handle all the prep work, including setting gains and filters, so you don't have to. The kit arrives as close to finished as possible, making installation straightforward.
• Easy Installation: Includes mounting hardware and clear step-by-step videos. All you need to do is mount the amplifier, connect the wiring under the seat and to the battery, and install the speakers.
• Lifetime Tech Support: We offer lifetime support for any items purchased from us, ensuring you have assistance whenever needed.

---

HD-A2B8 Amplifier Replacement Interface

Compatibility:

• Designed for Harley-Davidson models equipped with the Skyline OS Infotainment Unit.

⸻

Purpose:

• Allows for the removal of the stock amplifier.

• Facilitates the installation of higher power aftermarket amplifiers.

• Maintains compatibility with factory-installed Rockford Fosgate subwoofers and rear-mounted secondary amplifiers.

⸻

Manufacturer:

• Designed and manufactured by SeirenHD exclusively for Volunteer Audio.

• Engineered and manufactured in the USA.

⸻

Pre-Tuned for Plug-and-Play Performance

The HD-A2B8 interface from Volunteer Audio and SeirenHD is ready to install right out of the box—no tuning required for standard systems.

Already optimized for immediate use:

• Flat EQ Curve – Delivers a clean, uncolored audio signal

• Pre-Set Output Levels – Optimized to run clean at full volume with zero clipping

• Speed-Controlled Volume – Fully retained and pre-configured to match factory behavior

• Fader Support – Works immediately without any setup

• All Factory Features Intact – Including navigation prompts, radio EQ selections, and more

Tuning is optional, only necessary when:

• Activating crossovers

• Using the 31-band or 10-band EQ to customize for specific speaker setups

• Adjusting time alignment or per-channel output levels

⸻

Plug-and-Play Harnessing

The HD-A2B8 includes a harness that connects directly to all factory speaker wiring with zero modification to your motorcycle.

For expanded setups, additional plug-and-play harnessing is available below:

• Underseat Harness – Pins into the factory plug on base model bikes

• Lid Disconnect Harness – Clean, quick-disconnect solution for 6x9 lid speaker installations

• Tour Pack Harness – Adds plug-and-play rear audio for Tour Pack installations

• Lower Fairing Harness – Simple solution for adding speaker pods to your lower fairings

All harnessing options are pre-configured and labeled for quick installation and available for purchase below.

⸻

Integration Features:

• Utilizes the OE A2B chip for seamless factory integration

• Supports all factory infotainment updates

• Retains full factory functionality, including:

 • Fader

 • EQ selections with DSP profile adjustments

 • Speed-controlled volume

 • Navigation prompts

 • Digital A2B subwoofer output for HD Audio by Rockford systems

⸻

DSP Specifications:

• 10 Output Channels with Full DSP Control:

 • 8 Analog RCA Outputs

 • 2 Digital A2B Outputs (for Rockford subwoofers)

• Equalization:

 • Per-channel 31-band graphic EQ or 10-band parametric EQ

 • Global 7-band parametric EQ mirrors infotainment custom EQ settings

• Time Alignment:

 • Independent delay settings for every channel

• Crossover Control:

 • Independent high-pass and low-pass filters per output pair

• Level Adjustment:

 • Individual channel-level control for precise tuning

⸻

Technical Specifications:

• RCA Outputs:

 • 8 Channels, 4v RMS

 • Front, Rear, Subwoofer, and Auxiliary output configuration

• Frequency Response: 20 Hz – 24 kHz

• Signal-to-Noise Ratio: 112 dB

• DSP Resolution: 32-bit

• Operating Voltage: 6–28 volts

• Current Draw:

 • Idle: 14 µA

 • Full Power: 300 mA

• Warranty: 1 Year

---

Ready to Elevate Your Ride?

At Volunteer Audio, we've combined the Velocity Razor Pro amplifier with Velocity Razor Coax Neo RCN65 and RCN69 speakers to create a complete audio upgrade built for serious motorcycle performance.

With premium sound from the upper fairing, saddlebag lids, and Tour Pack, you'll experience incredible volume, exceptional clarity, powerful midbass, and immersive front-to-rear sound while maintaining a clean, factory-style installation.

Ready for a sound transformation? Let Volunteer Audio help you hear your Harley the way it was meant to sound.